It is possible if it's strong enough and has the right moves.
No its not an HM in leafgreen.
You have to have Grass to beat The first the you have to you lose after that
train your Pokemon that's it.
beat the elite four once
Beat the elite four.
go to One Island
You have to beat the Elite Four once.
nothing
beat the elite four and your starter has to be a bulbasaur
all you have to do is not get beaten
no you do not have to the elite 4 more than once
You have to beat the elite 4 and then go to the safari (it is really rare). You have to beat the elite 4 and then go to the safari (it is really rare).